The 49-242 is a high-quality spherical lens, boasting a convex-convex base shape and a circular design. This lens, sourced from the reputable vendor Edmund Optics, is a 9mm diameter by 13.5mm focal length uncoated UV double-convex lens.
The lens's geometry is meticulously crafted, with a thickness edge of 1.52mm and a thickness center of 3.3mm. The effective focal length (EFL) is 13.5mm, and the first radius of curvature (R1) is 11.84mm, while the second radius (R2) is -11.84mm. The back focal length (BFL) is 12.32mm, and both the inner and outer radii are 0mm.
The lens is made from fused silica, identified as mal-1965 in the Material ID. It is designed to operate at a wavelength of 587.6nm. The lens does not have any coating, which is indicated in the coating parameter.